Container to define pod dependency on other pods
50K+
This container can be used as init container to specify dependency of other pod. It will check for exiting pod with success status. If any pod with given label selector is found running in current namespace it will exit with success else exit with failure after timeout.
Use with github packages or The docker image is hosted on docker hub and can be found on hub.docker.com or github-packages
| Environment Variable | Required | Default | Description |
|---|---|---|---|
| POD_LABELS | Yes | - | This is comma (,) separated string of labels of dependency pods which will be checked for Running phase. |
| MAX_RETRY | NO | 5 | Maximum number of times for which init container will try to check if dependency pods are Running. |
| RETRY_TIME_OUT | NO | 1500 | Number of milliseconds init container will pause between each retry. |
Example usage:
spec:
containers:
...
serviceAccountName: {{ .Values.serviceAccount }} #optional
initContainers:
- name: pod-dependency
image: ylonkar/pod-dependency-init-container:1.0.2
env:
- name: POD_LABELS
value: app=nodeapp,name=mongo-1
- name: MAX_RETRY
value: "10"
- name: RETRY_TIME_OUT
value: "5000"
In case of RBAC this container requires pods resource get, list, watch access. Which can be provided by below yaml
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
name: {{ .Values.serviceAccount }}
rules:
- apiGroups:
- ""
resources:
- pods
- services
- endpoints
verbs:
- get
- list
- watch
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: {{ .Values.serviceAccount }}
namespace: {{ .Values.namespace }}
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
name: system:serviceaccount:{{ .Values.serviceAccount }}:default
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: {{ .Values.serviceAccount }}
subjects:
- kind: ServiceAccount
name: {{ .Values.serviceAccount }}
namespace: {{ .Values.namespace }}
Content type
Image
Digest
Size
44.7 MB
Last updated
over 5 years ago
docker pull ylonkar/pod-dependency-init-container